Upload Time Calculator

Your details

The total size of the file or batch you want to upload.
Your measured or ISP-advertised upload speed. Run a speed test at fast.com or speedtest.net to get the actual figure.
TCP/IP headers, handshakes, retransmissions and contention all reduce the effective throughput below the raw line speed. 85% is a solid default for a home broadband connection with low congestion.
If uploading many small files, per-file handshake overhead multiplies. For a single large file, leave this at 1.
Upload timeA few minutes
94.1seconds

Estimated wall-clock time for the transfer

Formatted duration1m 34s
Effective throughput5.31MB/s
File size in GB0.5GB
Speed for 1-minute upload78.4Mbps
94.1 s
Near-instant<10< 1 min10-60Few minutes60-300< 1 hour300+

Estimated upload time: 1m 34s.

  • Your effective throughput is 5.31 MB/s after the 15% overhead deduction.
  • To finish this transfer in under 60 seconds you would need at least 78.4 Mbps of upload capacity.
  • Run a speed test just before a critical upload to confirm your actual throughput - ISP-advertised speeds are the ceiling, not the guarantee.

Next stepKeep other applications from competing for bandwidth during the transfer window for the closest result to this estimate.

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